EPA Environmental Dataset Gateway


Open/Close section Identification Information
Title: EnviroAtlas - New Haven, CT - Meter-Scale Urban Land Cover Data (2014)
Abstract: The EnviroAtlas New Haven, CT EnviroAtlas Meter-scale Urban Land Cover (MULC) Data were generated from United States Department of Agriculture (USDA) National Agricultural Imagery Program (NAIP) four band (red, green, blue, and near infrared) aerial photography at 1 m spatial scale acquired on September 25, 2014. Seven land cover classes were mapped: water, impervious surfaces, soil and barren land, trees, and grass-herbaceous non-woody vegetation,as well as woody wetlands and emergent herbaceous wetlands. An accuracy assessment of 500 completely random and 50 stratified random photo-interpreted reference points yielded an overall MAX accuracy of 89 percent and an overall RIGHT accuracy of 92 percent. The area mapped is the US Census Bureau's 2010 Urban Statistical Area for New Haven, CT plus a 1 km buffer. This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).
Purpose: The EnviroAtlas MULC provides spatially detailed foundational data for approximately 100 derived EnviroAtlas Community information layers. Some layers are developed at the native one meter MULC scale and others by U.S. Census block group. While the EnviroAtlas National component is based on NLCD (National Land Cover Database, www.mrlc.gov) land cover data at 30 m spatial scale (30x30 m pixel dimensions from the Landsat sensor), the EnviroAtlas Community component is based on MULC data at 900 times the spatial scale of the NLCD. This permits analysis of common landscape features in the 1-10 m range which are unresolvable using 30 m NLCD pixels. Three examples of EnviroAtlas layers derived from MULC data are: Percent impervious area in 50m stream buffer; Value of asthma exacerbation cases avoided due to sulfur dioxide removed by trees ($/yr); Percent of busy roadway bordered by < 25 percent tree buffer. Some of many possible applications of MULC include: • Knowing the exact location and size of vegetated and non-vegetated spaces; • Identifying highly impervious areas that would most benefit from additional trees and other vegetation to mitigate surface runoff and urban heat island effects; • Measuring the width and character of urban riparian and street buffers; • Locating potential wildlife corridors, gaps and linkages; • Planning park development for maximum benefits. The overall goal of EnviroAtlas is to employ and develop the best available science to map indicators of ecosystem services production, demand, and drivers for the nation.
Open/Close section Distribution Information
Resource(Server) URL: https://enviroatlas.epa.gov/arcgis/rest/services/Supplemental/Landcover_AllCommunities/ImageServer
Download URL: https://edg.epa.gov/data/PUBLIC/ORD/ENVIROATLAS/Communities/NewHavenCT
Reference URL: https://www.epa.gov/enviroatlas/enviroatlas-data
Website URL: https://www.epa.gov/enviroatlas
Open/Close section Time Period of Content
Publication Date: 20170321
Progress: Completed
Frequency: asNeeded
Open/Close section Single Date
Date: 2014
Currentness: Ground condition
Open/Close section Spatial Domain
West Bounding Longitude: -97.683809
East Bounding Longitude: -97.131017
North Bounding Latitude: 26.190659
South Bounding Latitude: 25.824946
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Open/Close section Constraints
License https://edg.epa.gov/EPA_Data_License.html
Access: None
Use: None. Please check sources, scale, accuracy, currency and other available information. Please confirm that you are using the most recent copy of both data and metadata. Acknowledgement of the EPA would be appreciated.
Open/Close section Theme Keywords
Theme Topics: Environment and Conservation, Geological and Geophysical, Imagery and Base Maps
Open/Close section Contact Information
Originator: US Environmental Protection Agency (US EPA)
Email: EnviroAtlas@epa.gov
Address Type: mailing and physical address
City: Research Triangle Park
State: NC
Postal Code: 27709
Telephone: (919) 541-3832
Open/Close section Metadata Reference Information
File Identifier: {66bb3d88-be8d-428e-b137-0a427d0ad41c}
Metadata Date Stamp: 2017-03-22
Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998